I went to
http://www.skidcontrolcentre.co.uk/ and found it very good. Only £75 for 3 hours, they teach you for the first 1.5hours on the skid pan in fwd (1.3 escort) and a rwd (2.0 sierra). Then they just handed the cars over to you for the last half, where they wernt in the car with you. So you get to practise without them and try anything you like. Drifting became order of the day in the sierra.

Damn it was fun. If you can get about 4-6 of you to go, then you will have the whole place to yourself.
Did get a few vids of me going round.

May have to find them.